feat: add SQL console endpoint for local MariaDB queries

packages/backend/src/routes/server.ts

@@ -7,6 +7,7 @@ import {
   generateServerConfig,
   seedDatabase,
 } from "../services/server.service.js";
+import { getDockerClient } from "../services/docker.service.js";
 
 const router = Router();
 
@@ -67,4 +68,73 @@ router.post("/seed-db", async (req, res) => {
   }
 });
 
+router.post("/sql", async (req, res) => {
+  const { query, allowWrite } = req.body;
+  if (!query) return res.status(400).json({ error: "query required" });
+
+  const upperQuery = query.trim().toUpperCase();
+  if (
+    !allowWrite &&
+    (upperQuery.startsWith("DROP") ||
+      upperQuery.startsWith("TRUNCATE") ||
+      upperQuery.startsWith("ALTER"))
+  ) {
+    return res
+      .status(400)
+      .json({ error: "Destructive query blocked. Set allowWrite: true to override." });
+  }
+
+  try {
+    const docker = getDockerClient();
+    const container = docker.getContainer("layonara-mariadb");
+
+    const exec = await container.exec({
+      Cmd: [
+        "mysql",
+        "-u",
+        "nwn",
+        `-p${process.env.MYSQL_PASSWORD || "forge"}`,
+        "nwn",
+        "-e",
+        query,
+      ],
+      AttachStdout: true,
+      AttachStderr: true,
+    });
+
+    const stream = await exec.start({});
+    let output = "";
+
+    await new Promise<void>((resolve) => {
+      stream.on("data", (chunk: Buffer) => {
+        output += chunk.toString();
+      });
+      stream.on("end", resolve);
+    });
+
+    const lines = output
+      .trim()
+      .split("\n")
+      .filter((l) => l.trim());
+    if (lines.length === 0) {
+      res.json({ columns: [], rows: [] });
+      return;
+    }
+
+    const columns = lines[0].split("\t");
+    const rows = lines.slice(1).map((line) => {
+      const values = line.split("\t");
+      const row: Record<string, string> = {};
+      columns.forEach((col, i) => {
+        row[col] = values[i] || "";
+      });
+      return row;
+    });
+
+    res.json({ columns, rows });
+  } catch (err: any) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
 export default router;